Begin WebSocket support for Broadcast and Player control

modules/Guzzle/Http/QueryAggregator/QueryAggregatorInterface.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace Guzzle\Http\QueryAggregator;
+
+use Guzzle\Http\QueryString;
+
+/**
+ * Interface used for aggregating nested query string variables into a flattened array of key value pairs
+ */
+interface QueryAggregatorInterface
+{
+    /**
+     * Aggregate multi-valued parameters into a flattened associative array
+     *
+     * @param string      $key   The name of the query string parameter
+     * @param array       $value The values of the parameter
+     * @param QueryString $query The query string that is being aggregated
+     *
+     * @return array Returns an array of the combined values
+     */
+    public function aggregate($key, $value, QueryString $query);
+}